Correlation of Eagle Ford South Texas Eaglebine East Texas and Tuscaloosa Louisiana-Mississippi Using High Resolution Biostratigraphy, TOC/CO3 and Maximum Flooding Surface Sequence Stratigraphic Analysis

摘要

Four thousand (4000) feet of core in Forty-one (41) wells, six (6) Maximum Flooding Surfaces (MFS), nannofossils and foraminiferal abundance peaks and marker species, 800+ TOC/%CO3 values were used to evaluate and correlate the Eagle Ford South Texas, Eaglebine in East Texas and Tuscaloosa in Louisiana-Mississippi. Interpretation of high resolution biostratigraphy, and well-log sequence stratigraphic analysis identified six (6) third order Galloway type sequences and maximum flooding surfaces (MFS) in all project wells from Webb county in South Texas to Wilkinson County Mississippi were used to demonstrate the time correlation of rocks of Eagle Ford age of different facies from East to West. It is especially important to correlate to the Tuscaloosa TMS because it is an emerging play and a new oil reservoir in Mississippi and Louisiana In order to understand the complex relationship vertically and laterally of the Eagle Ford, Eaglebine and Tuscaloosa calcareous nannofossils and foraminiferal high resolution biostratigraphic analysis, TOC/%CO3 and Maximum Flooding Surface sequence stratigraphic analysis were completed on the project wells. The depth of the high value intervals of TOC per well is proposed as a minimum depth for placement of the landing point for lateral wells. Genetic Sequences range from Cenomanian 3 (Ce3) (96.01Ma) Sequence Boundary at top of Buda, to the Turonian 4 (Tu4) (87.88Ma) MFS in lower Austin. The Maness in South and East Texas basin, and Tuscaloosa in South Louisiana and Mississippi is characterized by Ce3 (95.69Ma) MFS. The Cenomanian Eagle Ford South Texas, Pepper shale in lower Woodbine Group East Texas Basin and the TMS in lower Tuscaloosa, are characterized by Ce4 (94.75Ma) and Ce5 (93.13Ma) MFS followed by a major unconformity at the Cenomanian-Turonian Boundary. The Turonian Eagle Ford South Texas, Eagle Ford Group (Upper Eaglebine) East Texas Basin and upper Tuscaloosa South Louisiana and Mississippi are characterized by the Tu1 (91.41Ma) to Tu4 (88.77Ma) MFS.